Originally Posted by Riyal
So what's the solution? I am on the same situation as you are. I have a backup TA but it's a JB version and I don't have a KK version. So what to do then?
1.Restore the TA on whichever rooted ROM you are in.
2.Flash the .290 file (0.9.16 version recommended) with checked "Reset Customisations".
3.Then delete the file C:\Flashtool\custom\mydevices\B******\ulcode.txt
4.Unlock your BL using flashtool. It initially asks for Flashmode and then unlocks the bootloader in fastboot mode.
5.Flash the 681 or 757 ROM on unlocked bl. Check the reset customisations once again.
6.Boot your phone after it and check if x-reality is working.
Tip: Use flower_bed,jpg image in official xperia images for maximum difference
My devices :
Xperia Z1 (RomAur v9.1 ROM + Adv.Stock Kernel v5
Lumia 920 (WP 8.1)